#include<stdio.h>

int main (){
    int year = 2015;

    if(((year % 4 == 0) && !(year % 100 == 0)) || (year % 400 == 0)){
        printf("%d年是闰年\n",year);
    }else{
        printf("%d年不是闰年\n",year);
    }
}